package thread;

/**
 * 互斥锁
 * 当使用多个synchronized锁定多个代码片段，并且指定的锁对象相同时，那么这些
 * 代码片段就是互斥的，即：多个线程不能同时执行他们
 *
 */
public class SyncDemo4 {
    public static void main(String[] args) {
        Boo boo = new Boo();
        Thread t1 = new Thread(){
            public void run(){
                boo.methodA();
            }
        };

        Thread t2 = new Thread(){
            public void run(){
                boo.methodB();
            }
        };
        t1.start();
        t2.start();

    }
}
    class Boo{
        public synchronized void methodA(){
            Thread t = Thread.currentThread();
            System.out.println(t.getName()+":正在执行A方法....");
            try {
                Thread.sleep(5000);
            }catch (InterruptedException e){
            }
            System.out.println(t.getName()+":执行A方法完毕");
        }

        public void methodB(){
            synchronized (this){
                Thread t = Thread.currentThread();
                System.out.println(t.getName()+":正在执行A方法....");
                try {
                    Thread.sleep(5000);
                }catch (InterruptedException e){
                }
                System.out.println(t.getName()+":执行A方法完毕");
            }
        }
    }
